Bulb-stenciling device.



O. WINSTON. BULB STENCIL'ING DEVICE.

APPLICATION FILED DEC-7| I916.

H. E m w w m 5 N00 n Emfi m A 0. n6 m m m y a e P we 6 w & MK 2 L Q ovnn'ron wms'rou; or MINNEABOLIS, Minnesota.

BULB-STENGILIN'GL DEVICE.

Specification of Lctt'ers'Patent.

Patented Mar. 5, 1918.

Application: filed: December 7, 1916'. S'criahNo. 1353580;

To alliwhom it may concern:

Be it known tlimtl, QVERTON WrNsroN, a citizen of the United States, residing at h linneapolis, in the county of I-lcnnepi-n and State of Minnesota, have; invented certain new and useful Improvements in Bulb:- Stencil 'ing Devices and I dohereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art tO W'hllCTM it appertains, to make and, use. the: same.v

This invention relates. to: stencil in-g devices, for use in. applying wax coating to the main body of an electric light bulb to thereby prepare the same for the application of frosted surfaces, and is in the nature of a modificationqof or improvement. on the bulb stenciling device disclosed and claimed in my earlier pendingapplication S. N. 134,284, filed of date December 1st, 1916, and entitled, Bulb stenciling devices.

Generally stated, the invention consists of the novel devices and combinations of devices hereinafter described and defined in the claims.

The invention is illustrated in the accompanying drawings wherein like characters indicate like parts throughout the several views. Referring to the drawings,

Figure 1 is a view chiefly in side elevation, but with some parts sectioned, showing the improved stenciling device and electric light bulb held thereby.

Fig. 2 is a bottom plan view of the parts shown in Fig. 1; and

Fig. 3 is a section on the line 3-3 of Fig. 1. i

The stenciling device comprises a suitable handle 4 having a curved extension bar or plate 5 to which one or more stencil blocks are applied. The device shown is intended for use in producing two distinct frosted zones of the globe of the light bulb, and hence. the said bar 5 is provided with two so-called blocks 6 and 7, both of which are formed with concave surfaces that closely fit the globe 8 of the light bulb. The shank of the light bulb is indicated by the numeral 9 and this shank is provided with the customary diametrically offset lock studs or lugs 10. The bulb is of the two-filament type, being provided with filaments, the hot spots of which are indicated at a and b, the point a being at the axis of the bulb and the point I) being offset from the axis of the bulb.

The: clamping lever 11. having: an extends ed arm 12', is; pivoted to the shank of the bar, 5 at 13 The bar 11 and its arnm12 constitute an intermediate piivoted lever,

the former is provided. with an interna-l'ly threaded head into which. sleeve.-

like blflillb! receiving sccket 145 is tightly screwed. outer portion of the. bore. of this: socket 14; closely fits: the shank 9; of the bulb and is provided with, longitudinal grooves; 15 through which: the: lock lugs lock lugs 10-thereof engaged with the ledge 16, thereby holding the light bulb against accidental rotation, but permitting the bulb to be rotated on its axis so as to properly position its filaments a and b, in respect to the frosted surfaces that are to be formed on the globe- A leaf spring 18 is attached at one end to the shank of the bar 5 and its free end presses the arm 12 outward, so as to hold the light bulb in close engagement with the concave face of the stencil locks 6 and 7.

When the bulb is held, as shown in Fig. 1, and is then dipped in paraffin, or other wax, all that surface of the bulb globe, except those portions covered by the stencil blocks 6 and 7, will be covered with wax, and then, when the globe is thereafter removed from the stenciling device, and dipped in acid or other liquid which, by its chemical action on glass. will produce a frosted zone, or which will otherwise produce a light dimming surface,'the bulb will, of course, be provided with the frosted light dimming surface corresponding to the forms of the so-called stencil blocks.

After the bulb has been frosted, the wax may be readily removed by dipping the bulb in hot water.

In Fig. 1, the broken line y is a line drawn tangent to the bulb globe and through the axis of the pivot 13. The broken line y is parallel to the line 3 and intersects the extreme lower portion of the stencil blocks 6 and. 7 and the broken line 1 is perpendicular to the lines 3 and 1 intersecting the axial filament a of the bulb, and bi-secting the line y.

bulbs comprising a handle having a curved extension bar provided with a plurality of stencil blocks spaced longitudinally thereof, a spring-pressed lever pivoted to said handle, a socket applied to one end of said lever and adapted to receive and to be interlocked with the shank of an electric light bulb, and a shank engaging spring within said socket.

2. A stenciling device comprising a handle having an extension bar provided with a stencil block, of a spring-pressed lever intermediately pivoted to said handle, a sleeve-like socket applied to one end of said lever and provided with a shank engaging spring, said .socket having longitudinal internal lock lug passages, and an annular internal stop ledge at the inner extremities of said lug passages.

8. A stenciling device comprising a bandle having an extension bar, a stencil block applied to the extension bar, alever pivoted to said handle and having an internally threaded head at one end and a socket sleeve screwed into said head, said socket sleeve having an internal lock shoulder and longitudinal lug passages leading thereto and a coiled spring anchored to the said inter-' nally threaded head and engageable with the shank of anelectrio light bulb when held by said socket.

In testimony whereof I affix my signature in presence of two witnesses.

OVERTON WINSTON.

Witnesses:

CLARA DEMAREs'r, BERNICE G. WVHEELER.

Copies 01 this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

Washington, D. 0. 

